You may be right, I'd assume plain compression does good enough trick obfuscating the code.

But please still consider obfuscation because

hiding our implementation from our competitors

giving "impression" to our customers that we want to protect our implementation

added security, at least trivial hacking is prevented

Above comments must be thought both from technical side and marketing side.
Some of those may be clearly marketing side story without any real added value on the technical side. It's a bit like "We got patents, and we rigorously protect our IPRs", but I do not have clear opinion about this.

Other considerations:

paying customers get an bonus of full source code to our product

developers need an option to use our product without obfuscation (also without compression)

Compressors should not be used because of HTTP1.1 specification enforces GZIP, additional compressing has only negative effects. Compression contains decompressor on client and therefore obfuscation is not accomplished.